fix: preserve back compat in path_id behavior

If the path_id is not configured it should also not be submitted, even
if we have it in the state. This is to preserve the portability that we
had in previous versions (e.g. when Terraform is executed with different
credentials).

internal/provider/resource_aws_account.go

@@ -358,8 +358,8 @@ func resourceAWSAccountUpdate(ctx context.Context, d *schema.ResourceData, m int
 		}
 
 		// Optionally add the path id.
-		if v, ok := d.GetOk("path_id"); ok {
-			params.PathId = aws.String(v.(string))
+		if pathIdConfig := d.GetRawConfig().GetAttr("path_id"); !pathIdConfig.IsNull() {
+			params.PathId = aws.String(pathIdConfig.AsString())
 		}
 
 		accountMutex.Lock()